Campbell SAT ARGOS Manual de usuario Pagina 172

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ZENO
®
-3200 USER MANUAL
Coastal Environmental Systems (206) 682-6048
Page 164
All SDI-12 and CCSAIL sensors are designed to be used where there is more than one sensor present on a
single communications link. for this reason, Line Item #17 is used by both SDI-12 and CCSAIL sensors
to designate the address of the serial sensor. Sensors using the NMEA 0183 protocol are not addressable,
but may be using optional checksum verification. for this reason, Line Item #17 for the GPS Receiver is
used to specify whether to use checksum verification on received GPS messages.
Sensor Type
Line Item #17
Code
(Line Item #1)
Name
Usage
Valid Values
11 Serial Compass N/A N/A
12 CCSAIL Sensor
19 Asynchronous CCSAIL Sensor
Sensor's CCSAIL
Address
0 to 9998
15 GPS Receiver
Use Checksum
Verification?
0 = no, 1 = yes
16
General Serial Script Sensor
(USI)
Sensor Address
Depends upon sensor
13 SDI-12 Sensor
17 Continuous SDI-12 Sensor
18 Concurrent SDI-12 Sensor
Sensor's SDI-12
Address
0 to 9 and A to F
Communication Retries
Once you have specified all of the communications port parameters, it is important to decide if you need
to use any "retries" for communication. Retries are necessary when:
Communication between the ZENO
®
-3200 and the serial sensor is suspect.
The serial sensor is busy and cannot immediately answer a poll to transmit data.
ZENOSOFT
®
will make as many extra attempts to receive data from a serial
sensor as are defined by the Retry Count in Line Item #16. Once a data
message is successfully received from the serial sensor, no more retries are
made.
If the ZENO
®
-3200 fails to communicate with a serial sensor, bit #4 in the
Global BIT
182
is set as is bit #2 in the Sensor Record's Error and Status
Code
183
.
User Interface Exclusion
182
Refer to Appendix D.
183
Refer to Section 7.4.
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